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In IVF-ET, embryo is typically transferred at which stage to the uterus?

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1. **IVF-ET**: In Vitro Fertilization followed by Embryo Transfer.
2. **Stages of Transfer**:
   - **ZIFT** (Zygote Intra Fallopian Transfer): Zygote or early embryo (up to 8 blastomeres) is transferred into the **fallopian tube**.
   - **IUT** (Intra Uterine Transfer): Embryos with more than 8 blastomeres are transferred into the **uterus**.
3. **Advanced Success**: While IUT can happen at the morula stage, modern clinical practice often targets the **Blastocyst stage** for uterine transfer because it mimics the natural timing of entry into the uterus and allows for better selection of the healthiest embryos.

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